If you reread my post I said that a meat bird would be better growing faster than intended. My thoughts echo what gjensen posted.I'm confused, what meat birds do you think would be too large for the SOP and end up not being what they are intended to be?
The quote in Storey's guide is at the bottom of page 246 and is actually about breeding broilers. It says that "at maturity each bird selected as breeder should weigh within 1/2 pound of the standard weight for the breed". In the paragraph before it mentions that "those extremely fast growers tend to be the least healthy".
If any of you think that book is bad, leave a review. https://www.backyardchickens.com/pr...-chickens-3rd-edition/reviews?overallRating=4 It is the highest rated book with 17 reviews, 14- 5 star and 3- 4.5 star.